JPH05344487A - Video addition information transmission system inter-conversion device - Google Patents

Abstract

PURPOSE:To send video addition information even between devices whose transmission system differs. CONSTITUTION:Whether an inputted video signal has video addition information sent by a video addition information transmission system (VBID) utilizing a vertical blanking period or by a transmission system superimposing a DC component at an S video terminal (S-DC) is detected by detectors 1,3, decoding means 5,6 for both the transmission systems or one transmission system are provided on the output side and an S video signal (9) having video addition information by both the transmission systems or a composite video signal (10) having the video addition information by the VBID system is outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video additional information transmission system mutual conversion apparatus, and more particularly to a system for mutually converting different transmission systems of video additional information regarding aspect ratio.

[0002]

2. Description of the Related Art Recently, a receiver compatible with an aspect ratio of 16: 9 for high-definition broadcasting has been put into practical use, and even in the conventional NTSC system, a wide-picture image device having an aspect ratio of 16: 9. Is being put to practical use. As for the devices connected to these devices, the current aspect ratio is 4: 3 and 16:
It will be mixed with the one of 9 and it is also being connected to the monitor terminal of the high-definition receiver.

Therefore, in these cases, identification information about video information, that is, a video ID is needed so that the user's usability is not inconvenient. (1) Video additional information using the vertical blanking period Transmission method (hereinafter referred to as VBID method) (2) Method of superimposing DC on the S video terminal (hereinafter referred to as SD)
Two transmission methods (referred to as C method) have been proposed and implemented.

[0004]

Although both the VBID system and the S-DC system exist independently, they are not compatible with each other. Therefore, the video additional information is transmitted only between devices of the same system. For example, since the S-DC system supports only the S video terminal, when a video signal is transmitted from a device having only a video output terminal to a device having another S video terminal, or vice versa. However, there arises a problem that the video additional information cannot be transmitted. In order to solve such a problem, it is an object of the present invention to enable transmission of video additional information even between devices having different transmission methods.

[0005]

According to the present invention, it is detected whether the input video signal has video additional information transmitted by the VBID system or the S-DC system, and the output side is detected. Decoding means for both transmission methods or one of the transmission methods is provided, and conversion is performed so as to output an S video signal having video additional information according to both transmission methods and a composite video signal having video additional information according to the VBID method.

[0006]

Since the conversion is performed as described above, it is possible to transmit the video additional information between devices of different systems. Moreover, since the video additional information of the VBID system is always converted so as to be added, the transmission of the video additional information is not interrupted even after the recording / playback, dubbing, and the signal selector.

[0007]

1 is a block diagram showing the configuration of an embodiment of a video additional information transmission system mutual conversion apparatus according to the present invention. The present embodiment is a converter capable of handling an S video signal of either the VBID system or the S-DC system even if input, and in the figure, 1 is an S-DC system signal detecting S-DC system signal. DC decoder, 2 signal selector, 3 V
A VBID decoder for detecting a BID system signal, a Y / C synthesis circuit 4 for generating a composite signal,
5 is an S-DC encoder, 6 is a VBID encoder, 7
Is a control signal path including an OR circuit, 8 is a control signal path, and 9
Reference numerals 10 and 10 are an S video output terminal with S-DC and VBID, and a composite video signal output terminal with VBID.

Now, when an S-DC system signal is input, the S-DC decoder 1 detects it and passes through the control signal paths 7 and 8 to the S-DC encoder 5 and VBID.
The encoder 6 is actuated, and both types of video additional information are added to the S video output signal (9), and VBID information is added to the composite video output signal (10). Next, when an S video signal with VBID is input, V
The BID decoder 3 detects it, the S-DC encoder 5 is operated through the control signal path 8, S-DC information is added to the S video output signal (9), and the video output signal (10) is The composite video signal with VBID is formed and output as it is.

FIG. 2 is a block diagram showing the configuration of another embodiment of the video additional information transmission system mutual conversion apparatus according to the present invention. The present embodiment is a converter for a composite video signal with VBID. In the figure, 11 is a signal selector,
12 is a VBID decoder, 13 is a Y / C separation circuit, 14
Is an S-DC encoder, 15 is a control signal path, and 16 and 17 are video signal output terminals with VBID and S video signal output terminals with S-DC and VBID, respectively. When the composite video signal with VBID is input to the video signal input terminal, the video signal with VBID is output (16) as it is via the signal selector, and
The VBID decoder 12 detects that the VBID system is used, the S-DC encoder 14 is operated via the control signal path 15, and the Y / C separation circuit 13 outputs the S-DC information to the S video signal after Y / C separation. Added with S-DC and VBI
The video signal with D is output (17).

As described above, the mutual conversion device according to the present invention is always converted so that the video additional information according to the VBID system is added, and not only the so-called transmission of the video additional information between devices is possible. , Additional video information is not lost even after recording / playback, dubbing, and other signal processing.

[0011]

Since the video additional information mutual conversion apparatus according to the present invention is configured as described above, the video additional information can be transmitted between devices of different systems. In particular, when recording from a video signal source to a recording device through a color television receiver or a device having a selector function, if the device connected in the middle has the function according to the present invention, the system of the signal source or recording device is limited. Will not be done. Therefore, the range of connection can be expanded and the operability of the device can be improved. In the S-DC system, it is necessary to provide an S-video terminal, but in the VBID system, it is possible to support composite output, and by performing mutual conversion according to the present invention, a device having no S-video terminal can be obtained. Information can also be transmitted.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a video additional information mutual conversion device according to the present invention.

FIG. 2 is a block diagram showing the configuration of another embodiment of the image additional information mutual conversion device according to the present invention.

[Explanation of symbols]

 1 S-DC Decoder 2, 11 Signal Selector 3, 12 VBID Decoder 4 Y / D Synthesis Circuit 5, 14 S-DC Encoder 6 VBID Encoder 7, 8, 15 Control Signal Path 9, 17 S Video Output Terminal 10, 16 Video Signal output terminal

Claims (4)

[Claims] 1. A video to which video additional information is added by a first transmission method for transmitting video additional information using vertical blanking and a second transmission method for transmitting a DC component superimposed on an S video terminal. Input means capable of inputting at least one of the signals, video additional information decoding means of at least one transmission method for detecting video additional information in the video signal input from the input means, and the video additional information decoding means The video additional information encoding means of at least one transmission method for adding video additional information of different transmission methods to the input video signal controlled by the detection output of A video additional information transmission system mutual conversion device, which outputs an added composite video signal and an S video signal to which video additional information of both transmission systems is added. 2. The first transmission of the video additional information encoding means, wherein the input means inputs one of the S video signals to which the video additional information according to the first and second transmission methods is added. For each of the S video signal input by the system and the composite video signal obtained by combining the luminance component and the chromaticity component thereof, the first
2. The information transmission system mutual conversion device according to claim 1, wherein the video additional information according to the transmission system is added. 3. The input means inputs the composite video signal to which the video additional information according to the first transmission method is added, and the video additional information encoding means according to the second transmission method. The video addition information according to claim 1, wherein the video addition information according to the second transmission method is added to the S video signal obtained by separating the luminance component and the chromaticity component from the generated composite video signal. Information transmission system mutual conversion device. 4. The video additional information transmission according to claim 1, wherein the video additional information is a video ID signal indicating a screen mode when the aspect ratio of the video is converted. Method mutual conversion device.